Appreciating and living the three facts of impermanence: death is certain, time of death uncertain, and we take nothing with us into death; regret and death; moving beyond child-like morality of right and wrong; impermanence and the intensification of life experience; value of being able to experience life fully; how to do reflective meditations such as death and impermanence; how to use physical and emotional reactions in these meditations. The Jewel Ornament of Liberation by Gampopa, commentary on Chapter 4.